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- W2362994857 abstract "The paper presents a research on the preparation progress of rock burst induced by the gradual crack of different rock bandings to the critical state of rock burst and the laws of its portent to explode slightly.Three numerical models of tunnel excavation in intact rock mass,horizontally layered rock mass and deeply layered rock mass,are established with RFPA2D(rock failure process analysis).The excavation-induced rock burst mechanisms for tunnel excavation are examined with the numerical simulations of RFPA2D.Simulation results show that the code of RFPA2D is feasible.They also demonstrate that structure has an obvious effect on the collapse of the structure when the wall rock of the tunnel is destroyed.Different structural planes of various characteristics destroy the tunnel in a strikingly different state.Rock burst triggered by tunnel excavation is violent in horizontally layered rock mass,less violent in rock mass with deeply inclined bedding planes,and least violent in intact rock mass.Symmetry of tunnel fracture is embodied in intact rock mass and horizontal layered rock mass,while non-symmetry of tunnel fracture is provided with deep inclined layered rock mass.Brittle characteristics are obvious for the failure of wall rock during the loading process.Dilatancy is intensive in the direction of unloading for rock mass.Surrounding wall bulking is emerged sharply and increased gradually,resulting in narrower tunnel space." @default.
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- W2362994857 date "2011-01-01" @default.
- W2362994857 modified "2023-10-03" @default.
- W2362994857 title "Mechanism Investigation of Rockburst Induced by Tunnel Excavation under Layered Structure Conditions" @default.
- W2362994857 hasPublicationYear "2011" @default.
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